Simultaneous apatial and frequency domain filtering at the antenna inputs achieving up to +10dBm out-of-band/beam P 1dB

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    Multi-antenna transceivers with beam-forming are recently gaining interest for low GHz frequencies (<6GHz) [1-4]. In the antenna beam, (phase-shifted) signals from multiple antennas add constructively, improving SNR, while out-ofbeam signals add destructively (i.e. spatial filtering). Usually the summation point is behind some gain blocks, which then need to be capable of handling strong signals. To improve the input-referred compression point P1dB, a fully passive switched-capacitor approach was presented in [4], providing P1dB=+2dBm, but at a high noise penalty: NF=18dB. Here we propose to sum immediately at the baseband capacitors of passive mixer-first switched-RC downconverters. We show that this can render a direction-dependent RF impedance (spatial filtering) together with RF bandpass frequency filtering at lower noise and higher P1dB.
    Original languageUndefined
    Title of host publicationSolid-State Circuits Conference Digest of Technical Papers (ISSCC), 2013 IEEE International
    Place of PublicationPiscataway
    Number of pages2
    ISBN (Print)978-1-4673-4515-6
    Publication statusPublished - 18 Feb 2013
    EventIEEE International Solid-State Circuits Conference, ISSCC 2013 - San Francisco, United States
    Duration: 17 Feb 201321 Feb 2013

    Publication series

    PublisherIEEE Press
    ISSN (Print)0193-6530


    ConferenceIEEE International Solid-State Circuits Conference, ISSCC 2013
    Abbreviated titleISSCC
    Country/TerritoryUnited States
    CitySan Francisco


    • EWI-23442
    • IR-86270
    • METIS-297701

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